CN109797780B

CN109797780B - Method for laying impermeable material of refuse landfill

Info

Publication number: CN109797780B
Application number: CN201910076465.8A
Authority: CN
Inventors: 汪思芳
Original assignee: Rizhao City De Heng Information Technology Co ltd
Current assignee: Rizhao Xinrui Investment Promotion Development Co ltd
Priority date: 2017-08-06
Filing date: 2017-08-06
Publication date: 2020-12-08
Anticipated expiration: 2037-08-06
Also published as: CN109610517A; CN109648705A; CN109797780A; CN109516468A; CN109653254B; CN109653254A; CN107246031A; CN109653255A; CN107246031B

Abstract

The invention discloses a method for paving an impermeable material of a refuse landfill, which comprises the following steps of (1) cleaning a site of the impermeable material to be paved, and tamping or compacting an original soil layer of the site; (2) drilling a plurality of holes on the field by using a drilling machine, and cleaning the drilled soil layer; (3) laying medium sand or coarse sand with small mud content on the field, and leveling and compacting; (4) pouring the impermeable material onto the ground, and leveling and compacting to finish the first laying; (5) pouring the fine sand on the ground, and leveling and compacting; (6) and pouring the impermeable material onto the field, and leveling and compacting to finish secondary laying. The invention has the advantages of excellent anti-seepage performance, simple structure, low price, convenient construction and no secondary pollution to the environment.

Description

Method for laying impermeable material of refuse landfill

The application is a divisional application with the application number of 2017106638541, application date of 2017, 08 and 06 and the invention name of 'a method for paving an impermeable material in a refuse landfill'.

Technical Field

The invention relates to a method for laying an impermeable material of a refuse landfill.

Background

With the global crisis of fresh water resources aggravated, water shortage becomes one of the main factors restricting the development of human beings, and the rational utilization of water resources becomes an important content of research in various fields. The reasonable utilization of water resources is mainly reflected in the aspects of increasing the water resource quantity, improving the utilization rate of water, saving water resources and the like. At present, surface water resources in China are polluted by domestic garbage, so that domestic garbage landfill impervious materials are increasingly used, the domestic garbage landfill impervious materials have the function of completely isolating garbage landfill objects from surrounding strata through an impervious layer structure to form an independent and closed environment of a garbage landfill, and further prevent garbage leachate from permeating underground to pollute underground water around the landfill. The effective anchoring of the impermeable layer structure of the refuse landfill is the guarantee of realizing the function of the impermeable layer structure, and is an engineering measure which is necessary for the effective function of the impermeable system of the domestic refuse landfill, but the conventional impermeable engineering has higher cost and the impermeable effect is still not very obvious at present.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a method for laying an impermeable material of a refuse landfill.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the invention provides a method for laying an impermeable material of a refuse landfill, which comprises the following steps: (1) cleaning a field to be paved with the anti-seepage material, and tamping or compacting an original soil layer of the field; (2) drilling a plurality of holes on the field by using a drilling machine, and cleaning the drilled soil layer; (3) laying medium sand or coarse sand with small mud content on the field, and leveling and compacting; (4) pouring the impermeable material onto the ground, and leveling and compacting to finish the first laying; (5) pouring the fine sand on the ground, and leveling and compacting; (6) pouring the impermeable material onto the ground, and leveling and compacting to finish secondary laying; wherein, the impermeable material is prepared by the following steps: mixing and stirring modified kaolin, sludge and microcrystalline kaolinite in a certain ratio, firstly stirring at a first stirring speed, adding water according to a water-cement ratio of 0.3-0.5 while stirring, then alternately switching the stirring speed between the first stirring speed and a second stirring speed for 3-4 hours, wherein the second stirring speed is higher than the first stirring speed; wherein, the modified kaolin is prepared by the following steps: placing 50-100 parts by weight of kaolin in a preparation machine, keeping the temperature for 5-10 minutes without stirring when the temperature is only raised to 110 ℃ of 100-, the bottom of lower accommodation space has the fresh air inlet, be equipped with the driving body in the accommodation space down, the upper portion of driving body is equipped with the actuating lever, go up the actuating lever and pass through accommodation space in proper order, be connected with the puddler transmission behind the mixing container, the lower part of driving body is equipped with down the actuating lever, lower actuating lever transmission is connected with the impeller, it is equipped with the electric circle to go up accommodation space, the cladding of mixing container bottom has the metal disc, the electric circle takes place alternating magnetic field and makes the metal disc generate heat, the last side of going up accommodation space has the second intercommunicating pore, the second intercommunicating pore. The paving method of the landfill anti-seepage material has the advantages of excellent anti-seepage performance, simple structure, low price, convenient construction and no secondary pollution to the environment, adopts the kaolin as the anti-seepage material, has low cost, changes the interlaminar and surface structures of the kaolin through the interlaminar exchange and the adsorbability of the kaolin and the interlaminar and surface interaction of the copolymerized nylon and the kaolin, improves the expansion capacity of the kaolin during moisture absorption, and can effectively prevent seepage. In addition, the invention uses a special preparation machine to prepare the impermeable material, has high preparation efficiency and excellent heat dissipation performance, and does not scald users.

Preferably, when the preparation machine works, the electric coil generates heat to the metal disc, meanwhile, the driving body drives the stirring rod and the impeller to rotate, the stirring rod stirs materials in the mixing container, the impeller sucks external wind into the lower accommodating space from the air inlet hole to cool the driving body, then the external wind enters the upper accommodating space to cool the electric coil, and finally the external wind enters the first cooling space and is discharged through the air outlet hole.

Preferably, the mixing and stirring of the modified kaolin, the sludge and the microcrystalline kaolinite according to a certain ratio comprises the following steps: 30-40 parts of modified kaolin, 70-90 parts of sludge and 10-20 parts of microcrystalline kaolinite are selected.

Preferably, the cross section of the first cooling space gradually increases from top to bottom.

Preferably, an electric coil frame is further arranged in the upper accommodating space, the electric coil frame is sleeved on the upper driving shaft, and an electric coil is wound on the electric coil frame.

Preferably, a second cooling space is formed between the outer wall of the mixing container and the inner wall of the machine head, the second cooling space is communicated with the first cooling space through a third communication hole, and a fourth communication hole communicated with the second cooling space is further formed in the outer wall of the mixing container.

Preferably, the third communicating hole is large at the top and small at the bottom.

Preferably, the first speed is from 150 rpm to 180 rpm and the second speed is from 300 rpm to 350 rpm.

Drawings

FIG. 1 is a schematic flow chart of the paving method in the present embodiment;

fig. 2 is a schematic structural diagram of the preparation machine of the present embodiment.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 1, the method for laying an impermeable material of a landfill site according to an embodiment of the present invention includes:

(1) cleaning the place of the impermeable material to be paved and tamping or compacting the original soil layer of the place.

(2) Drilling a plurality of holes on the field by using a drilling machine, and cleaning the drilled soil layer. The diameter of each hole groove is 5cm-10cm, the depth of each hole groove is 3 cm-4 cm, and the distance between every two adjacent hole grooves is 15 cm-20 cm.

(3) And laying medium sand or coarse sand with small mud content on the field, and leveling and compacting. Therefore, the medium sand or coarse sand with small mud amount can fill a plurality of hole grooves and then is paved on the field, and a certain seepage-proofing effect can be achieved.

(4) And pouring the impermeable material onto the ground, and leveling and compacting to finish the first laying.

(5) Pouring the fine sand on the ground, and leveling and compacting the fine sand.

(6) And pouring the impermeable material onto the field, and leveling and compacting to finish secondary laying.

The seepage-proofing materials are paved twice, and fine sand is used for isolating the seepage-proofing materials from the field and the two layers of seepage-proofing materials, so that the seepage-proofing effect is improved. The impermeable material is prepared by the following steps: the modified kaolin is prepared by mixing and stirring 35 parts by weight of modified kaolin, 80 parts by weight of sludge and 12 parts by weight of microcrystalline kaolinite, stirring at 160 revolutions per minute, adding water according to the water-cement ratio of 0.4 while stirring, and then alternately switching the stirring speed between 160 revolutions per minute and 320 revolutions per minute for 3.5 hours.

The modified kaolin of this example was prepared by the following steps: 50 parts by weight of kaolin is placed in a preparation machine, stirring is not carried out, only the temperature is raised to 105 ℃, the temperature is kept for 7 minutes, then 25 parts by weight of copolymerized nylon, 1 part by weight of cross-linking agent, 1 part by weight of initiator and 1 part by weight of distilled water are mixed to form a reaction solvent, the reaction solvent is added into the preparation machine, the heating temperature is controlled to be 150 ℃, stirring is carried out for 9 minutes, the reaction solvent is cooled to 100 ℃, 0.5 part by weight of stearic acid is added, a uniform coating layer is generated between the stearic acid and the kaolin, particularly, covalent bond formation between the coating layer and a coated object is facilitated, the performance index of modified kaolin is improved, and the non-metallic performance can also be improved. The paving method of the landfill anti-seepage material has the advantages of excellent anti-seepage performance, simple structure, low price, convenient construction and no secondary pollution to the environment, adopts the kaolin as the anti-seepage material, has low cost, changes the interlaminar and surface structures of the kaolin through the interlaminar exchange and the adsorbability of the kaolin and the interlaminar and surface interaction of the copolymerized nylon and the kaolin, improves the expansion capacity of the kaolin during moisture absorption, and can effectively prevent seepage. In addition, the invention uses a special preparation machine to prepare the impermeable material, has high preparation efficiency and excellent heat dissipation performance, and does not scald users.

The machine of the present embodiment is described in detail below. As shown in fig. 2, the preparation machine 100 in this embodiment includes a machine head 101 and a machine base 102, the machine head 101 has a cavity, a mixing container 103 for materials is disposed in the cavity, the mixing container 103 is barrel-shaped, a machine head cover 104 is disposed above the cavity to cover the mixing container 103, and a pressure valve 125 is disposed on the machine head cover 104 to control a pressure value in the mixing container 103.

A stirring rod 105 is arranged in the mixing container 103, the base 102 is provided with a closed accommodating space 106, a first cooling space 107 is formed between the outer wall of the accommodating space 106 and the inner wall of the base, the bottom of the first cooling space 107 is provided with an air outlet 108, a partition plate 110 with a first communication hole 109 is arranged in the accommodating space 107, the accommodating space 106 is divided into an upper accommodating space 111 and a lower accommodating space 112 by the partition plate 110, the upper accommodating space 111 and the lower accommodating space 112 are communicated through the first communication hole 109, the bottom of the lower accommodating space 112 is provided with an air inlet 113, a driving body 114 is arranged in the lower accommodating space 112, the driving body 114 can be a motor, the upper part of the driving body 114 is provided with an upper driving rod 115, the upper driving rod 115 sequentially penetrates through the upper accommodating space 111 and the mixing container 103 and is in transmission connection with the stirring rod 105, a gap is arranged between the bottom of the stirring rod 105 and the bottom of the mixing container 103, so as to improve the stirring effect, because the material is often pushed to the middle position of the bottom of the mixing container 103, the size of the stirring rod 105 close to the middle position of the bottom of the mixing container 103 is increased, and the improvement of the stirring efficiency is facilitated. The lower portion of the driving body 114 is provided with a lower driving rod 116, the lower driving rod 116 is connected with an impeller 117 in a transmission manner, and the impeller 117 is mainly used for driving wind to circulate so as to realize heat dissipation. The upper accommodating space 111 is provided with an electric coil 118, namely an electromagnetic coil, the bottom of the mixing container 103 is coated with a metal disc 119, the electric coil 118 is controlled by a controller to generate an alternating magnetic field to enable the metal disc 119 to generate heat, the metal disc 119 is provided with a bottom wall and a side wall, the bottom wall is tightly attached to the bottom of the mixing container 103, the side wall is tightly attached to the side wall at the lower part of the mixing container 103 to perform three-dimensional heating on the mixing container 103, and the heating efficiency is. The upper side of the upper receiving space 111 has a second communication hole 120, the second communication hole 120 is communicated with the first cooling space 107, so that when the preparation machine is operated, the coil 118 heats the metal plate 119, and the driving body 114 drives the stirring rod 105 and the impeller 117 to rotate, the stirring rod 105 stirs the materials in the mixing container 103, the impeller 117 sucks external wind from the wind inlet 113 into the lower receiving space 112 to cool the driving body 114, then the wind enters the upper receiving space 111 to cool the coil 118, finally enters the first cooling space 107 and is discharged through the wind outlet 108 (see the arrow direction in fig. 2), so that the preparation machine 100 of this embodiment can continuously operate to successfully complete the preparation of modified kaolin for a plurality of times, because when the driving body 114 drives the stirring rod 105 to continuously operate, the driving body 114 generates more heat, and the coil 118 generates heat during operation, if the heat is continuously accumulated, must not be dissipated and will fail. Because the heat generated by the driving body 114 is far greater than the heat generated by the electric coil 118, the heat dissipation of the driving body 114 is most urgent, so that the impeller 117 sucks the external wind into the lower accommodating space 112 from the air inlet 113 to cool the driving body 114, and the temperature of the driving body 114 is ensured not to be too high, then the cooling wind exchanging heat with the driving body 114 enters the upper accommodating space 111 to cool the electric coil 118, and finally enters the first cooling space 107 and is discharged through the air outlet 108.

In order to further improve the cooling effect, the cross section of the first cooling space 107 is gradually increased from top to bottom, for example, the included angle between the outer wall of the first cooling space 107 and the vertical direction is 3 to 4 degrees, so that the air outlet 108 is convenient to exhaust air, negative pressure is formed inside, air is favorably fed into the air inlet 113, and cold air circulation is accelerated. The air outlet 108 is located at the periphery of the air inlet 113, the air inlet 113 is located below the impeller 117 and located at the periphery of the impeller 117, the first connecting hole 109 is located below the coil 118 and located at the inner periphery of the coil 118, so that the coil 118 is fully contacted, the coil 118 is cooled, the coil 118 is arranged around the upper driving rod 115 through the coil frame 121, the coil frame 121 is sleeved on the upper driving rod 115, and the coil 118 is wound on the coil frame 121. Due to the action of the impeller 117, the temperature of the outer wall of the base 102 of the embodiment is not too high, and scalding is avoided. In order to ensure that the outer wall of the handpiece 101 cannot be scalded, in this embodiment, a second cooling space 122 is formed between the outer wall of the mixing container 103 and the inner wall of the handpiece 101, the second cooling space 122 is communicated with the first cooling space 107 through a third communicating hole 123, the outer wall of the mixing container 103 is further provided with a fourth communicating hole 124 communicated with the second cooling space 122, the third communicating hole 123 is large at the top and small at the bottom, when the air outlet 108 exhausts air, a venturi effect is formed at the third communicating hole 123, so that external cold air can enter the second cooling space 122 from the third communicating hole 123, it is ensured that the temperature of the outer wall of the handpiece 101 is not high, a user cannot be scalded, and the cross section of the second cooling space 122 is gradually reduced from top to bottom, so that cold air can fully dissipate the heat of the handpiece 101.

When preparing modified kaolin, 50 parts by weight of kaolin is placed in a mixing container 103, a driving body 114 does not work, a stirring rod 105 and an impeller 117 do not work, only an electric coil 118 works, when the temperature of the mixing container 103 is raised to 105 ℃, heat preservation is carried out for 7 minutes, then 25 parts by weight of copolymerized nylon, 1 part by weight of a cross-linking agent, 1 part by weight of an initiator and 1 part by weight of distilled water are mixed to form a reaction solvent, the cross-linking agent is N, N-methylene bisacrylamide, the initiator is selected from benzoperoxide amide, the reaction solvent is added into the mixing container 103, the heating temperature is controlled to be 150 ℃ through the electric coil 118, the driving body 114 works, the stirring rod 105 is stirred for 9 minutes, the impeller 117 works to suck air, finally, the mixing container 103 is controlled to be cooled to 100 ℃, and 0.5 part by weight.

The present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make various modifications without creative efforts from the above-described conception, and fall within the scope of the present invention.

Claims

1. A method for laying an impermeable material of a refuse landfill is characterized by comprising the following steps: (1) cleaning a field to be paved with the anti-seepage material, and tamping or compacting an original soil layer of the field; (2) drilling a plurality of holes on the field by using a drilling machine, and cleaning the drilled soil layer; (3) laying medium sand or coarse sand with small mud content on the site, and leveling and compacting; (4) pouring the impermeable material onto the ground, and leveling and compacting to finish the first laying; (5) pouring the fine sand on the ground, and leveling and compacting; (6) pouring the impermeable material onto the ground, and leveling and compacting to finish secondary laying;

wherein, the impermeable material is prepared by the following steps: mixing and stirring modified kaolin, sludge and microcrystalline kaolinite in a certain ratio, firstly stirring at a first stirring speed, adding water according to a water-cement ratio of 0.3-0.5 while stirring, then alternately switching the stirring speed between the first stirring speed and a second stirring speed for 3-4 hours, wherein the second stirring speed is higher than the first stirring speed; wherein, the modified kaolin is prepared by the following steps: placing 50-100 parts by weight of kaolin in a preparation machine, keeping the temperature for 5-10 minutes without stirring when the temperature is only raised to 110 ℃ of 100-, the bottom of the lower accommodating space is provided with an air inlet, a driving body is arranged in the lower accommodating space, the upper part of the driving body is provided with an upper driving rod, the upper driving rod sequentially penetrates through the upper accommodating space and the mixing container and then is in transmission connection with a stirring rod, the lower part of the driving body is provided with a lower driving rod, the lower driving rod is in transmission connection with an impeller, the upper accommodating space is provided with an electric coil, the bottom of the mixing container is coated with a metal disc, the upper side part of the upper accommodating space is provided with a second communicating hole, and the second communicating hole;

when the preparation machine works, the electric coil heats the metal disc, the driving body drives the stirring rod and the impeller to rotate, the stirring rod stirs materials in the mixing container, the impeller sucks external air into the lower accommodating space from the air inlet hole to cool the driving body, then the external air enters the upper accommodating space to cool the electric coil, and finally the electric coil enters the first cooling space and is discharged through the air outlet hole;

the mixing and stirring of the modified kaolin, the sludge and the microcrystalline kaolinite in a certain ratio comprises the following steps: 30-40 parts of modified kaolin, 70-90 parts of sludge and 10-20 parts of microcrystalline kaolinite are selected.

2. The method of laying an impermeable material for a landfill site according to claim 1, wherein the cross section of the first cooling space is gradually increased from top to bottom.

3. The method for laying impermeable material of refuse landfill according to claim 1, characterized in that the upper containing space is further provided with an electric coil frame, the electric coil frame is sleeved on the upper driving rod, and the electric coil is wound on the electric coil frame.

4. The method of laying a landfill yard impermeable material of claim 1, wherein the first rotation speed is 150 rpm to 180 rpm and the second rotation speed is 300 rpm to 350 rpm.